Loom stop motion



July 20, 1954 J. LACHAPELLE .LOOM STOP MOTION Filed May 1, 1955 Patented July 20, 1954 assists LOOM STOP MOTION Jerome Lachapelle, Ville St. Joseph, Quebec, Canada, assignor to Drummondville Cotton Company Limited, Montreal, Quebec, Canada, a corporation of Canada Application May 1, 1953, Serial No. 352,483

4 Claims.

The present invention relates to improvements in textile looms and more particularly to a means for automatically stopping a 100m when the cloth roll has been filled to a predetermined amount.

During the weaving process, textiles are normally woven in a continuous length but are removed from the loom in shorter lengths or cuts. These cuts are usually maintained at a length suitable for inspection and subsequent shipping to the customer. Usually, provision, in the form of a warp measuring motion, is made at the slasher for indicating the length of a cut on the warp yarns so that the operator of the loom will know when the end of a cut is near. When the portion of the cloth bearing the mark is wound on the cloth roller the loom is stopped and. the cloth cut at the mark and removed from the loom. As will be appreciated, this means that the operator must watch the run of each loom fairly closely at the end of each cut so as to be able to stop the loom at the required time.

The present invention aims to provide a means of automatically stopping a loom when a predetermined amount of cloth has been wound on the cloth roller.

Accordingly, the invention is a loom stop motion which, in combination, with the usual cloth roller, cloth roller mounting means, and the knock-off mechanism of the loom, provides a ent invention, the preferred means of transmitting the movement of the cloth roll shaft consists of an elongated flexible rod mounted in a flexible tube. Each end of the flexible tube is provided with an adjustable cylindrical terminal member and each end of the flexible rod is connected to a headed plunger slidably mounted in one of the cylindrical members. One of the plunger cylinder assemblies is mounted to the loom frame with the plunger head in the path of the cloth roller while the other assembly is mounted to the loom frame beneath and adja cent to a pivotally mounted knock-off member. The knock-01f member is mounted on the loom frame so as to be capable of being pivoted into the path of the oscillating lay of the loom and is also pivotally connected to the knock-off lever of the loom. With this arrangement, depression of the first plunger, through actuation by the descending cloth roll, slides the flexible rod through the flexible tube so as to extend the plunger at the other end. The second plunger acts against the knock-off member placing it in the path of the lay so that the movement of the lay pushes the knock-off member and so pulls the interconnected knocloofi lever into stop position.

As the plunger-cylinder assemblies are each adjustable as to the eifective length of the plunger, the position of the plunger head relative to the cloth roller can be predetermined so that the stopping action may take place at any predetermined position of the cloth roll relative to the amount of cloth wound on.

As will be appreciated, the descent of the cloth roll is gradual under the influence of the weight of cloth wound on and therefore there would be numerous brushing contacts of the cloth roll shaft on the plunger head before it is depressed sufficiently to actuate the knock-off member.

In order to eliminate this brushing contact the present invention provides a means in the form of a resiliently biased snap action lever which is mounted on the cloth roll stand in the path of the cloth roller and between the shaft of the cloth roll and the plunger head of the flexible rod. With this arrangement a slight depression of the lever is suflicient to trip the lever, and through the influence of a tensioned spring, the lever quickly descends giving the flexible rod the necessary push to actuate the knock-off member of the loom stop motion.

This application is a continuation in part of United States Patent application Serial Number 272,554, filed February 20, 1952, now Patent No. 2,658,562.

Having thus generally described the nature of the invention, particular reference will be made to the accompanying drawings showing by way of illustration a loom stop motion apparatus in accordance with the invention, and in which:

Figure l is a diagrammatic View of a portion of a loom to illustrate certain parts associated with a preferred loom stop motion in accordance with the invention.

Figure 2 is an enlarged detail of a portion of the cloth roll stand and cloth roll of the loom to show the roll mounting means and relative position of the snap action lever.

Figure 3 is an enlarged detail view of a portion of the cloth roll stand and cloth roll shown in Figure 2 to illustrate the relative position of the quick action lever in relation to the plunger end of the loom stopping apparatus.

Figure 4 is a diagrammatic view of the quick action lever arrangement separate from the cloth roll stand to illustrate in more detail, as indicated the loom, l2 designates the oscillating lay of the" loom and M designates the cloth roll stand.

The present apparatus is designed to transmit the downward movement oftlie Clijllh'filOlT l-6 on: the stand it to a knock-of'arrangement posi tioned in the path of the lay" l2: Tl'ieknock-ofi arrangement when engaged by the lay is adapted to pull the usual knock-01f lever' H3,i11to-.-loom;.

stopping position.

The knock-off arrangement shown consists of a knock-off bunt 2Q, secured to the lay l2, which is adapted foo-engage; a knock-:oiffimemben22i'when this member is=raised; The knockz-off member 22 is pivotally mounted to a knock-ofi'linkz i pivotally mounted: in a knocki-off' stand 26 att'ached to:the-loom frame. A connecting rod 28- exten'ds' between the knock cff member 22 andithe'knockoff leverlS- so thatwthe' forward motionof the member 22, under: the influence of'the lay l2, pulls the lever [8' intoizloom; stopping position. This. arrangement'is in. common use on many automatic moms and is designed primarily in combination with a: Warp: stop motion actuated through breakage of warp threads.

In accordance: with: the present invention a bracket 68 is securedi'to. thecloth roll stand I4 beneath thetake-off slot soas'tosupport one end of the plunger, cylinder arrangementso that the plungerheadi 52'is'. disposed in the path of the cloth roll. The. plunger? headr'52 is secured to one end of a fiexiblerodii l which is mounted for sliding movement ina flexible tube 35 in the manner of a Bowdencable attachment. One-end of the flexibleitubei36 is secured to'an adjusting nut 53', which is threadablyengaged with a cylindricalmember Mimountedon the bracket 665 The end of theiflexible rod. 3:i'to which' the plunger. head 52iis-.attached:extends through and beyond the. cylindrical member- 44 forming a plungerv portion 42 The flexible tube 36 and the flexible rod 34=-slidably mounted therein extend along theimachine to a. bracket afifsecuredto th'e looinframe beneath the. pivotally mounted knock-off" member 22 so that a second plunger head 32 secured to theiother end of the flexible rod is adapted to come in contact with and. raisethe memberZZ into. thepath of the knock-off "bunt 26' secured to theloomlay I2 Theflexible tube.36.is mountedon the-bracket Bilbythe threaded engagement of an adjusting nuti36 witha cylindrical: member-AD which is mounted. on thebra'cket 39. The end of theflexible rod to which the plunger head- 32 1s attached extends-'through'and considerably beyond the cylindrical member forming aplunger' portion similartothe portion 42'.

lhe cloth roll standis of a wellknown construction wherein the clothroll' l 6-is supported on bearings for vertical sliding descent in-a guiding slot under. the graduallyrincreasing weight of cloth wound on. The-downwardmovement of the cloth roll lfi acts on a rack .90 whichgis inmeshed engagement with a train of gears (not illustrated) which actiagainst a spring loaded shaftto control the windingon of the'cloth.

In the present construction, a quick action lever 62 is pivotally mounted on the bracket 60 by a pin 64 so that an extended lever arm portion 66 is disposed in the path of the cloth roll shaft I6 between the shaft and the plunger head 52.

The main body of the quick action lever 62 is provided with. an. elongatedislot' G'B Which terminates in offset openings'filand 10. The lever 62 is thus adapted to pivot about the pivot pin 64, which extends across a slot 12 provided in the bracketalifl to accommodate the lower end of the lever body. Through the influence of a coil spring-86, attached to the lower end of the lever 6'2 and maintained in extended position by an extensionarm. 82'" projecting downwardly from thelowersurface'ofthe bracket 60, depression of thelever. portion 66 is then adapted to move the ofiset slot opening out of engagement with the pin- 6! and causes the lever 62 to quickly slide downwards. As the lever arm portion 66 descends it: contacts. the plunger head 52' and through the .fiexibl'e rod 3 4=causes a corresponding raising'of: the plunger headz32iso as to. raise=thc knock-off; member'22 and stop the loom.

Thisloomstopping construction through the action of the resilient'spring 89. and the position of the'slot' end openings 69', l0-ofrthe leverw fiz isadaptedto beactuated by a very slight downward movement .of: the cloth roll l6, thus avoiding excess. brushing: contacts of the shaft against the-plungerh'ead 52 so as to minimize wear on the apparatus I 'claim:

1. In a loom having-a cloth roll stand and a cloth roller slidably' mounted for vertical descent on said standas'the cloth is wound on, a loorn'stopmotion comprising the-combination with loom stopping mechanism: including a knock-off lever assembly adapted to actuate the knock-off lever of. the' loom'into loom stoppingposition andhaving a pivotally: mounted member engageable by the loom lay when raised, and a resilientlybiased snap action lever pivotally mounted" on said-cloth rollstandbeneath and in th'epath of'said'cloth" roller, and acfiexib'le motion transmitting member between said cloth roll stand and said knock-off assembly, whereby downward movement-of said clot-h roller actuates said snap action lever'and said lever movement is transmitted'to cause'upward movement of said-pivotally mounted knock-off lever assembly member.

22A: loom stop=motionas claimed in claim 1, wherein said flexible motion transmitting member comprises aflexible cable slidablyhoused within the flexibletubeand extending from adjacent said cloth roll standto adjacent said loom stopping assembly; one end of said fiexiblecable being in'- the path of said snapaction lever and the other end'being'disposedbeneath said pivotally mounted" knock-off member.

3. In aloomhaving a cloth roll stand and a cloth roller slidably "mounted for'vertical descent on'said stand as the cloth is wound-on, a loom stop motion comprising the combination with loom stopping mechanisnrincluding a knock-01f lever assembly adaptedto actuate the knock oli leverofthe loom intoloom stopping position; and having-a 1 pivo tally 'rn ounted memberconnected tothe'loom knock-off lever and engageable by'the lay of the loom when raisedand a. flexible cable slidably housediin a rlexibletuhe extending from 'thesaidcloth roll stand to. adjacentzsaid .knock-offtlever'. assembly, said: tube being adjustably mounted on: one end to" a:

bracket secured to the frame of said loom beneath said pivotally mounted stop motion member with one end of said flexible cable extending beyond said flexible tube beneath said cloth roller with the other end of said flexible cable extending beyond the other end of said flexible tube directly beneath said pivotally mounted stop motion member, a resiliently biased snap action lever pivotally mounted on said bracket secured. to said cloth roll stand and having a portion dis posed in the path of said cloth roller and between said cloth roller and said first end of said flexible cable, whereby downward movement of said cloth roller is adapted to actuate said snap action lever into resiliently biased movement against said first end of said flexible cable and the move" ment of said flexible cable is transmitted to cause upward movement of said pivotally mounted stop motion member raising it into the path of said loom lay.

4. A loom stop motion as claimed in claim 3, wherein said snap action lever is formed to have a main body portion and an extended lever arm portion disposed in the path of said cloth roller, said main body portion including an elongated slot having offset terminal ends, said pivotal connection to said bracket being made by a pin passing through said elongated slot, and said lever is resiliently biased by a coil spring extending between said lever main body and said bracket, the connection of said spring to said lever main body portion being beneath said pivotal connection whereby said lever body is normally resiliently urged so as to descend relative to said bracket and is restrained by the engagement of the lower terminal end of said slot with said pivot pin, said engagement adapted to be freed by the depression of said lever arm portion.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 793,964 Stimpson July 4, 1995 907,692 Bracken Dec. 29, 1908 1,016,009 Herbert Jan. 30, 1912 1,872,893 Cobb Aug. 23, 1932 2,049,356 Costello July 28, 1936 2,456,193 Howell et a1 Dec. 14, 1948 

